package lab02.test32;

import java.util.HashMap;
import java.util.Map;

public class Test {
    public static void main(String[] args) {

        Map<String,String> map=new HashMap<>();

        //向map中添加数据
        //id—>"1"、name—>"张三"、gender—>"男"、
        // age—>"25"、love—>"爱学Java"
        map.put("id","1");
        map.put("name","张三");
        map.put("gender","男");
        map.put("age","25");
        map.put("love","爱学java");

        //遍历一个map
        for (Map.Entry<String,String> entry:map.entrySet()){

            System.out.println(entry.getKey()+":"+entry.getValue());

        }

        System.out.println("集合的大小："+map.size());

        //删除集合中的键为age的元素
        for(Map.Entry<String,String> entry:map.entrySet()){

            if(entry.getKey().equals("age")){
                map.remove(entry.getKey());
            }
        }



        System.out.println();

        for (Map.Entry<String,String> entry:map.entrySet()){

            System.out.println(entry.getKey()+":"+entry.getValue());

        }

        System.out.println("删除后集合的大小："+map.size());

    }
}
